Furnace for heating metal bars



(No Model.)

S. RRBYNOLDS;

FURNACE FOR HEATING "METAL BARS. No. 262,477. Patented Aug. 8, 1882.

UNITED STATES FFICEQ ATENT FURNACE FOR HEATING METAL BARS.

SPECIFICATION forming part of Letters Patent No. 262,477, dated August8, 1882.

Application filed November 3, 1881.

To all whom it may concern:

Be it known that I, SAMUEL F. REYNOLDS, a citizen of the United States,residing at Auburn, in the county of Cayuga and State of New York, haveinvented certain new and useful Improvements in a Forge or Apparatus forHeating Metals, of which the following is a specification, referencebeing bad therein to the accompanying drawings.

My invention relates to a forge or apparatus for heating metals, theobject being to pro vide means for controlling the heat and limiting theextent of surface subjected to its action.

The invention consists in the construction and arrangement of devicesfor dropping or forcing water under pressure of an air-blast uponaportion of the metalunder treatment, as hereinafter more fullydescribed and claimed.

In the annexed drawings, which represent an apparatus embodying myinvention, and in which like parts are denoted by like letters in theseveral views Figure 1 is a perspective view of my improved forge orapparatus for heating and chilling metals. Fig. 2 is a transversesection of the same, and Fig. 3 represents detail views of air and waterpipes.

The letter A denotes a furnace,which is provided with a grate, a. Thisfurnace may be constructed of fire-brick or other suitable material, andis arranged in any convenient form or manner, according tocircumstances. Atits upper part, on one or both sides, is arranged awater trough or tank, B, which is inclined inward on its outer side andprovided with an exit-tube, b, which rests in a notch or groove formedin the side of the furnace.

Above the water-trough B is suspended an air or blast pipe, 0, which issupported in brackets or standards D D, arranged at each end of theforge or furnace. This air-pipe is provided with an inlet, 0, thatcommunicates with a suitable fan or other device for driving air whichescapes from the pipe 0 through a longitudinal slot, d,'forined therein.Within the airpipe O is arranged a smaller pipe, E, having perforationsce for the passage of water,whichwill be driven by-the blast of air in(No model.)

a thin sheet through the slot d in the air-pipe. The bars of iron orother metal to betreated are laid transversely over the top of thefurnace, as shown by dotted lines in Fig. 2.

In swaging or upsetting iron bars for wagon-axles, crank-pins, andsimilar pieces of work requiring a shoulder or collar upon the bar, Ihave found it advisable to keep a certain portion of the iron cold, sothat the shoulder or collar maybe formed at the proper place and withincreased facility. By limiting the extent of surface to which the heatis applied the bar may he worked and handled with greater convenienceand without the use of tongs. It will be seen that by placing the barsof metal upon the forge in such manner that the portions upon whichshoulders or collars are to be formed will come above the water-troughand beneath the slot in the blastpipe, so as to be subjected to theaction of the air and water forced through said slot, a cooling effectwill be produced upon the bars at these points, which will prevent themfrom being influenced by the heat to which the remaining portions of thebars are exposed. It the bars are now removed and their heated portionshammered or otherwise manipulated under the action of rolls ordraw-plates, the necessary collars or shoulders may be formed with greatfacility at those portions of the bars previouslycooled by the water andairblast. The water, after passing in a sheet through the slot in thepipe 0 and thence upon the bars of metal, falls into the watertrough Band overflows through its exit-tube b. The water trough or tank ispreferably faced with fire-clay, and forms a complete water -baek, theincline on its rear side serving to throw the water toward the innerside of the furnace, and, by cooling the same,assists in limiting thespread of heat upon the bars under treatment.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In an apparatus for heating metal bars preparatory to forming collarsor shoulders upon the same, the combination,with a forge, of aperforated water-pipe inclosed in an airpipe having a longitudinal slot,said pipes be- 1 o pipe,whereby water may be forced under pressure of anair-blast against portions of metal bars placed over said furnace,substantially as and for the purpose described.

In testimony whereof I affix my signature in presence of two witnesses.

SAMUEL F. REYNOLDS.

Witnesses:

M. B. KIMBARK, S. M. POWELL.

